PIGG

phosphatidylinositol glycan anchor biosynthesis class G (EMM blood group)

Relationship to CMT

Candidate — 4p16.3
First described 2025 Candidate gene
Subtype1
SubtypeInheritanceClassOMIMSentinel Publication
SubtypePIGG Inheritance— ClassCandidate OMIMn/a Sentinel Publicationnot recorded

ClinVar Variants

Pathogenic and likely pathogenic variants in PIGG, as classified in ClinVar, are read live from NCBI.

Reported in CMT
Reported in Other Diseases

Reported in a disease other than CMT. Listed apart rather than counted as CMT variants.

Variants w/o a Recorded Disease

Pathogenic or likely pathogenic in ClinVar, submitted without a disease recorded.

What the review stars mean

Review stars are ClinVar’s measure of how well a classification is supported: four for a practice guideline, three for an expert panel review, two for agreement among multiple submitters, and one for a single submitter with criteria provided. A record with no criteria provided earns no stars and is not indexed.

Only aggregate germline records are indexed. Uncertain and conflicting classifications are not. Experts in CMT makes no claim to the accuracy of ClinVar data. This index is provided for informational purposes only.

Gene Function

PIGG catalytic subunit of the ethanolamine phosphate transferase 2 complex that transfers an ethanolamine phosphate (EtNP) from a phosphatidylethanolamine (PE) to the 6-OH position of the second alpha-1,6-linked mannose of a 2-acyl-6-[6-phosphoethanolamine-alpha-D-mannosyl-(1->2)-alpha-D-mannosyl-(1->6)-2-phosphoethanolamine-alpha-D-mannosyl-(1->4)-alpha-D-glucosaminyl]-1-(1-radyl,2-acyl-sn-glycero-3-phospho)-1D-myo-inositol (also termed H7) intermediate to generate a 2-acyl-6-[6-phosphoethanolamine-alpha-D-mannosyl-(1->2)-6-phosphoethanolamine-alpha-D-mannosyl-(1->6)-2-phosphoethanolamine-alpha-D-mannosyl-(1->4)-alpha-D-glucosaminyl]-1-(1-radyl,2-acyl-sn-glycero-3-phospho)-1D-myo-inositol (also termed H8) and participates in the eleventh step of the glycosylphosphatidylinositol-anchor biosynthesis Source: UniProt

Indexed Identifiers

No HGNC Aliases
hgnc_idHGNC:25985
ensembl_gene_idENSG00000174227
coords_grch38chr4:499195-541173
coords_grch37chr4:492989-533985
entrez_id54872
omim_gene616918
uniprot_idsQ5H8A4
refseq_accessionNM_017733
mane_refseqNM_001127178.3
mane_ensemblENST00000453061.7

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